Exam 2 Flashcards
Chapter 7 part 1
how many bones are in the body
206
why do the number of bones vary
(digits, ribs) decreases as Age with Fusion (~270 at Birth)
2 divisions of skeletal system
axial and appendicular
Skull, Ossicles, Hyoid, Vertebrae, Rib Cage
axial
Pectoral Girdle, Upper Limbs, pelvic girdle, lower limbs
appendicular
what develop in lambdoidal or coronal sutures
sutural bones/ wormian
number of bones in axial skeleton
80
number of bones in appendicular skeleton
126
projections include
processes
condyle
facets
rounded tubercle
crest
line
spine
tuberosity
trochanter
epicondyle
where tendon or ligament attach is called
processes
what do depressions include
depressions, groove, fossa, notch, meatus, fissure, foramen, also sinuses
a smooth flattened
surface covered with articular
cartilage and forms one side of
a joint
facet
a large rounded
protuberance covered with
articular cartilage forming the
other side of the joint
condyle
8 bones in cranium
Frontal, Parietal (2), Temporal (2), Occipital, Ethmoid, Sphenoid
what are sutures
(4) Immovable Joints with Jagged edges for Strength
coronal suture separates
frontal and parietal
squamosal separate
pariteal and temporal
sagittal separate
between parietal
lambdoidal separate
parietal and occipital
top of skull, removed to see interior
calvaria
what bone is the path for eyes and ears
cranium
attachment for muscles: facial expression, chewing, swallow, speech
cranium
forehead is
frontal
coronal suture , frontal sinus,
anterior cranial fossa- support frontal lobe
supraorbital foramen (BV and nerve for eye/eyelid)
frontal
what bone acts as a protective brain= sides and roof with a sagital and lambdoid suture
parietal
sutural bones (wormian). superior and inferior temporal line and (attachment sites for temporalis muscle- mastication= chew
parietal
how many bones in eye orbit
7
name the bones in the eye orbit
frontal, sphenoid, zygomatic, maxilla, lacrimal, ethmoid, palatine
tears from eye into nasal cavity is called
nasolacrimal canal
optic nerve
vision